\frac{3}{7}73 ÷ k = 5 ÷ 2\frac{1}{3}231
\frac{3}{7}73 ÷ k = 5 × \frac{3}{7}73
k = \frac{3}{7}73 ÷ \frac{15}{7}715
k = \frac{3*7}{7*15}7∗153∗7
k = \frac{1}{5}51
k = 0,2
2) 5,5 ÷ 8 = k ÷ \frac{2}{11}112
\frac{11}{2}211 × \frac{1}{8}81 = k ÷ \frac{2}{11}112
k = \frac{11*2}{16*11}16∗1111∗2
k = \frac{1}{8}81
k = 0,125
3) k ÷ \frac{5}{9}95 = 1\frac{4}{5}154 ÷ 6
k ÷ \frac{5}{9}95 = \frac{9}{5*6}5∗69
k = \frac{5*3}{9*10}9∗105∗3
k = \frac{1}{6}61
4) 20 ÷ 3\frac{1}{4}341 = \frac{4}{13}134 ÷ k
\frac{20*4}{13}1320∗4 = \frac{4}{13}134 ÷ k
k = \frac{4*13}{13*80}13∗804∗13
k = \frac{1}{20}201
k = 0,05
1 уровень
1. 76:4=18 2. 72:12=6 3. 108:9=12 4. 9/17= 153
18/6=108 56:4=14
8/16=128
2. уровень
1. 13/9=117 2. 3/28=84 3. 17/8=136 4. 13/5=65 5. 15/5=75
8/13=104 36/3= там : 46:2=23 7/18=126
52:4=13
580 и 679
Пошаговое объяснение:
90*7=630
450:9=50
630-50=580
160*4=640
13*3=39
640+39=679